I always like to wheel this out
"Nice car. It's a Zonda yeah mate?".
"Err, YEAH!"
There's also a regular chap who catches me when I'm washing her. First thing he asked (before "hello, nice car") was "How much is it worth?". I told him about 7k. Every time he comes past now, "You sure it's only worth 7k? Looks more like 40k". I've had this same question 4 times now, same bloke
I think he might be a couple of ditchfinders short of matched rubber all round.